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BUG: KASAN: slab-use-after-free in _raw_spin_lock_irqsave+0x40/0x60
Read of size 1 at addr ffff88811f6a70d8 by task jfsCommit/118

CPU: 0 UID: 0 PID: 118 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 print_report+0xba/0x230
 kasan_report+0x117/0x150
 __kasan_check_byte+0x2a/0x40
 lock_acquire+0x84/0x350
 _raw_spin_lock_irqsave+0x40/0x60
 __mutex_lock+0x3da/0x1550
 jfs_syncpt+0x25/0x90
 txEnd+0x2e5/0x530
 jfs_lazycommit+0x5b8/0xaa0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Allocated by task 17893:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x31c/0x660
 lmLogOpen+0x2d1/0xfa0
 jfs_mount_rw+0xee/0x670
 jfs_fill_super+0x754/0xd80
 get_tree_bdev_flags+0x431/0x4f0
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x341/0xd30
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 15798:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5c/0x80
 kfree+0x1c1/0x620
 lmLogClose+0x297/0x520
 jfs_umount+0x2ef/0x3c0
 jfs_put_super+0x8c/0x190
 generic_shutdown_super+0x13d/0x2d0
 kill_block_super+0x44/0x90
 deactivate_locked_super+0xbc/0x130
 cleanup_mnt+0x437/0x4d0
 task_work_run+0x1d9/0x270
 exit_to_user_mode_loop+0xed/0x480
 do_syscall_64+0x33e/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88811f6a7000
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 216 bytes inside of
 freed 1024-byte region [ffff88811f6a7000, ffff88811f6a7400)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88811f6a6800 pfn:0x11f6a0
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x17ff00000000240(workingset|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 017ff00000000240 ffff888100041dc0 ffffea000418c010 ffffea0004499810
raw: ffff88811f6a6800 000000080010000f 00000000f5000000 0000000000000000
head: 017ff00000000240 ffff888100041dc0 ffffea000418c010 ffffea0004499810
head: ffff88811f6a6800 000000080010000f 00000000f5000000 0000000000000000
head: 017ff00000000003 ffffea00047da801 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5810, tgid 5810 (syz-executor), ts 65168103270, free_ts 0
 post_alloc_hook+0x231/0x280
 get_page_from_freelist+0x24dc/0x2580
 __alloc_frozen_pages_noprof+0x18d/0x380
 allocate_slab+0x77/0x660
 refill_objects+0x331/0x3c0
 __pcs_replace_empty_main+0x2e6/0x730
 __kmalloc_cache_noprof+0x392/0x660
 batadv_hard_if_event+0xe7a/0x1700
 notifier_call_chain+0x1ad/0x3d0
 register_netdevice+0x173a/0x1cf0
 veth_newlink+0x4a4/0xb70
 rtnl_newlink_create+0x329/0xb70
 rtnl_newlink+0x166a/0x1bb0
 rtnetlink_rcv_msg+0x7d5/0xbe0
 netlink_rcv_skb+0x232/0x4b0
 netlink_unicast+0x75c/0x8e0
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88811f6a6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811f6a7000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811f6a7080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                    ^
 ffff88811f6a7100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811f6a7180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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